Answered

Aidez moi svp ! B=-4+2x(-3x(5-7)-9) et C=(-1)x(-2)x(-3)x(-4) SVP urgent ! 

Sagot :

B=-4+2x(-3x(5-7)-9)
  =-4+2(-3x(-2)-9)
  =-4+2(6-9)
  =-4+2x(-3)
  =-4-6
  =-10

C=(-1)x(-2)x(-3)x(-4)
   =2x12
   =24